Vitamin B12 deficiency is fairly common in the US, with estimates ranging from 8-39% of the population is deficient. Vitamin B12 is critical to health, as it is necessary for the production of red blood cells, the myelin sheath which protects nerves, and for proper
mitochondrial metabolism to produce energy.
Deficiency is associated with several chronic diseases including cardiovascular and neurodegenerative diseases, peripheral neuropathy, renal failure and hypothyroidism.
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